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Association between ventral spread and grayscale brightness ratio.
| Ventral Spread | ||||
|---|---|---|---|---|
| Variable | Overall (n = 84) |
(+) (n = 61) |
(−) (n = 23) |
p Value |
| Brightness ratio | 1.47 (1.17–1.94) | 1.66 (1.41–2.10) | 1.16 (1.09–1.26) | <0.001 1 |
Values are median (IQR); 1 p values were derived from Mann–Whitney’s U test; Shapiro–Wilk’s test was employed for test of normality assumption.
